What is the primary purpose of creating pressure in the economizer vestibules?

The primary purpose of creating pressure in the economizer vestibules is to prevent soot and combustion gases from leaking into other areas of the system. When the economizer vestibules are under pressure, it helps contain the combustion gases, ensuring that these potentially harmful gases do not escape into the boiler room or other surrounding areas. This containment is essential for maintaining safety and efficiency within the system, as leakage can lead to a variety of problems, including environmental hazards and reduced operational efficiency. Proper pressure management in these areas ensures a controlled environment conducive to optimal boiler operation, and it also contributes to the longevity of system components by minimizing exposure to corrosive gases.